Sqrt(x-3) or even sqrt(x)-3 cannot be simplified. And without the value of x, they cannnot be evaluated.
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square root of 12 = sq rt of (4 x3) = 2 x sq rt 3
Square root is the same as raise to the 1/2 power, so multiply the exponents {(ab)c = abc}, so sqrt(x^3) = (x3)1/2 = x3/2
Integral of x3/2dx using power rule = (5/2)x5/2 2.5 times the square root of x to the fith.
x is.
-1/2*x-3/2 which is equal to -1/[2*x3/2]